CN205618326U - Auto electric machine vacuum pump - Google Patents

Abstract

The utility model discloses an auto electric machine vacuum pump, including the pump case, be provided with the pressure chamber in the pump case, the pressure chamber communicates respectively has air inlet and the gas outlet of setting on the pump case, be provided with the check valve on air inlet and the gas outlet, be provided with in the pressure chamber and make the pressure chamber produce the piston portion that atmospheric pressure changes, the pump case internal slipping is connected with and lies in the intraoral first portion of sliding of admitting air and lie in the intraoral second portion of sliding of giving vent to anger, the first portion of sliding and second slide the position and just can be promoted by piston portion in piston portion's activity direction, first portion of sliding and second slide and partially make do not that air inlet and gas outlet are asynchronous to be switched on and close. Air inlet and gas outlet asynchronously switch on and close, and at the in -process of piston rebound, the air inlet seals and the gas outlet switches on, has realized the uniflow of the gas in the pump case, through the effect of secondary seal, strengthens sealed effect.

Description

Vehicle electric motor vacuum pump

Technical field

This utility model relates to fluid variable displacement type mechanical field, particularly to a kind of vehicle electric motor vacuum pump.

Background technology

Existing diesel locomotive, is usually and uses gasoline or diesel oil as power, reduce discharging to meet national energy-saving Needs, present China Automobile Industry strategy as power, is changed into the clean energy resourcies such as employing electric power as power from fuel.

In prior art, publication No. is that the patent of invention of " CN 102619725 A " discloses a kind of electric automobile vacuum Pump, it is rotated as power drive eccentric by motor, then makes the piston in valve pocket move up and down, thus Producing pressure change in valve pocket, vacuum pump drive gas flow is moved.

Multiple pistons that drive of general internal combustion engine move, and the volume cost for motor considers, typically Arranged by vacuum pump is relatively big, but in the work process of vacuum pump, the air capacity that its one-off sucks is relatively big, air Flowing velocity is too fast, can produce huge noise in vacuum pump, by arranging in the air inlet position of vacuum pump in this patent There is deafener, serve the noise reduction to vacuum pump.

But during inhaling in reality, exitting, the air inlet connected with valve pocket and gas outlet can be provided with check valve, Check valve controls the air inlet to valve pocket and gives vent to anger, so that the internal air-flow producing constantly flowing of valve pocket；After a long time use, Check valve can the problem of aging generation gas leakage, thus affect the workmanship of vacuum pump, affect the work efficiency of vacuum pump.

Utility model content

The purpose of this utility model is to provide a kind of vehicle electric motor vacuum pump avoiding check valve generation gas leakage.

Above-mentioned technical purpose of the present utility model has the technical scheme that a kind of vehicle electric motor is true Empty pump, including pump case, is provided with pressure chamber in described pump case, described pressure chamber is respectively communicated with the air inlet being arranged on pump case With gas outlet, described air inlet and gas outlet are provided with check valve, are provided with in described pressure chamber and make pressure chamber produce air pressure The piston portion of change, in described pump case, sliding connects has the first slipping part being positioned at air inlet and is positioned at the second of gas outlet Slipping part, described first slipping part and the second slipping part are positioned on the activity direction of piston portion and can be promoted by piston portion, described First slipping part and the second slipping part make air inlet and gas outlet asynchronous conduction and closedown respectively.

By using technique scheme, piston portion moves down, and expands pressure chamber, makes the pressure in pressure chamber decline, Now the second slipping part on gas outlet encloses QI KOU, defines secondary seal with the check valve on gas outlet, it is to avoid gas Reveal；Air inlet is also closed by the first slipping part on air inlet simultaneously, makes the negative pressure in pressure chamber higher, then passes through Piston portion moves down, and abuts with the first slipping part, makes air inlet open, and then the check valve on air inlet makes air inlet lead Logical, it is achieved air inlet, in the process, even if check valve occurs aging leakage, in pressure chamber, it is still in the state of opposing seal, The problem avoiding the gas leakage of the aging generation of check valve；Air inlet and gas outlet are asynchronous conduction and closedown simultaneously, so During piston moves up, air inlet is closed and gas outlet conducting, it is achieved that the one-way flow of the gas in pump case.

As preferably, in described pump case, it is respectively arranged with the elastic reset making the first slipping part and the second slipping part reset Part, described first slipping part or the second slipping part are provided with the through hole making pressure chamber with ft connection.

By using technique scheme, although the first slipping part and the second slipping part can be carried out by the effect of gravity Reset, but during by gravity reduction, slipping part is easy to block in pump case, cause making air inlet or gas outlet close Close, reduce sealing effectiveness；It is provided by after elastic reset part makes the first slipping part and the second slipping part be promoted by piston portion, pressure Tight elastic reset part, makes elastic reset part produce elastic potential energy, at piston portion not and between the first slipping part and the second slipping part When occurring to compress, the first slipping part and the second slipping part are pushed in situ by elastic potential energy, it is achieved that reset, simultaneously in order to ensure pressure Being in sealing state under the normality of power chamber, by being provided with through hole on the first slipping part or the second slipping part, under normality, first is sliding Shifting portion and the second slipping part block air inlet and gas outlet, piston portion when upwards action, the through hole on slipping part is moved to Air inlet or the position of gas outlet, air inlet or gas outlet realize conducting.

As preferably, described first slipping part is positioned at the lower section of the short transverse of piston portion, and described second slipping part is positioned at The top of the short transverse of piston portion, described through hole is arranged on the second slipping part.

By using technique scheme, piston portion moves downward when carrying out air-breathing, and it is sliding that the bottom of piston portion triggers first Shifting portion, makes air inlet open, negative pressure make the check valve on air inlet open, it is achieved air inlet；Piston portion moves upward and makes pressure simultaneously Power chamber is in malleation, and the elastic potential energy of elastic reset part makes inlet close simultaneously, and then piston portion moves upward triggering second Slipping part, makes through hole on the second slipping part turn on gas outlet, and malleation makes the check valve on gas outlet open, final gas from Position, gas outlet is to discharge at a high speed.

As preferably, described first slipping part includes that the first sliding bar, described second slipping part include the second sliding bar, institute Stating pump case and be internally provided with the sliding passage slided for the first sliding bar and the second sliding bar, described first sliding bar and second is slided Move bar outside sliding passage, extend the abutting block abutted with piston portion.

By using technique scheme, the first sliding bar and the second sliding bar by the sliding with sliding channel side wall even Slide in being connected on pump case, make the first sliding bar and the second sliding bar be hidden in pump case, it is to avoid the main body of sliding bar and piston portion Between clash into, cause the problem that sliding bar ruptures；The lower section of the first sliding bar and the second sliding bar is provided with abutting block, Thus when sliding bar is hidden in pump case, piston portion still can by with the abutting abutted between block, make the first sliding bar and Second sliding bar moves.

As preferably, the sidewall of described gas outlet is provided with the insertion groove that the end for the second sliding bar is inserted.

By using technique scheme, by being provided with inserting of the end insertion for the second sliding bar in position, gas outlet Entering groove, insertion groove reaches and the coordinating of the second sliding bar, it is achieved that the effect of sealing, when the second sliding bar moves up, makes The end of two sliding bars is moved further in insertion groove, just can make position, through-hole alignment gas outlet, it is achieved gas outlet is with outside Connection, simultaneously the most under normal conditions, the through hole on the second sliding bar is under cover in the lower section of gas outlet.

As preferably, being provided with dividing plate in described pump case, described pressure chamber is positioned at the lower section of dividing plate, the top of described dividing plate For gas conveyor chamber, described gas conveyor chamber includes inlet chamber and outlet chamber, in described inlet chamber and outlet chamber respectively with pressure Chamber connects, and described check valve is separately positioned on inlet chamber and outlet chamber, and described air inlet connects with inlet chamber, described gas outlet Connect with outlet chamber.

By using technique scheme, check valve is set directly on air inlet and gas outlet can realize vacuum pump Normal work, but the sidewall being because check valve distance pump case is the nearest, and the assemblage gap between check valve and pump case will cause The problem revealed, is provided by inlet chamber and outlet chamber, is arranged on the dividing plate within pump case by check valve, it is to avoid unidirectional The problem that the gas that valve assemblage gap causes is revealed from the sidewall of pump case.

As preferably, being provided with hush pipe in described air inlet, described inlet chamber passes through hush pipe and ft connection, described The opening that the end for the first sliding bar is inserted it is provided with in hush pipe.

By using technique scheme, be arranged on hush pipe pump case outside apart from gas outlet position farther out, vacuum During pump perseveration, because there is the distance that there is air between hush pipe and gas outlet, so locating in vacuum pump When negative pressure, gas is inhaled in air inlet, and wind speed is very fast, now can produce the sound that screams, by hush pipe is arranged on air inlet In mouthful, thus when gas is in air inlet, the high-speed air through air inlet is carried out noise reduction；Open on hush pipe simultaneously It is provided with the opening that the end for the first sliding bar is inserted, when the first sliding bar is movable into and out opening, serves closing and open The effect of hush pipe, controls hush pipe and plays the effect of noise reduction.

As preferably, described air inlet is axially disposed the stepped hole inserted for hush pipe, and described hush pipe is arranged There is the step coordinated with stepped hole.

By using technique scheme, air inlet is provided with stepped hole, on hush pipe, is provided with step simultaneously, will Hush pipe with step is inserted in QI KOU, facilitates the installation and removal of hush pipe, and hush pipe is by modes such as screw threads simultaneously It is fixed with stepped hole.

As preferably, being inserted with several baffles in described hush pipe vertically, described baffle is by hush pipe point Being divided into multiple silencing cavity, each described baffle is provided with venthole, the sidewall of described venthole protrudes from the table of baffle Face, is provided with interlayer between inwall and the outer wall of described hush pipe, is provided with noise reduction sponge in interlayer.

By using technique scheme, silencing cavity makes air mix in silencing cavity and persists, slow down and flow through The wind speed of hush pipe, because wind speed reduces, so while the noise that high wind speed brings also reduces；Air in silencing cavity simultaneously Venthole from baffle enters into next silencing cavity, and the sidewall of venthole protrudes from the surface of baffle, adds air Flow through the stroke of venthole, it is to avoid air flows through thin-walled and produces vibration and scream sound；Shake in order to avoid hush pipe produces simultaneously Dynamic, therefore it is provided with interlayer between the inwall and outer wall of hush pipe, it being provided with noise reduction sponge in interlayer, noise reduction sponge serves and subtracts Few hush pipe causes the effect of vibration due to wind speed, and noise reduction sponge subtracts transmitting to the noise outside hush pipe to serve simultaneously Weak effect.

As preferably, described check valve includes the air-vent being arranged on dividing plate, and described air-vent is separately positioned on air inlet In chamber and outlet chamber, described dividing plate being provided with the covering plate covering air-vent, described dividing plate, piston portion and covering plate use non- Ferrimagnet is made, and described piston portion is provided with the first magnetic part, described covering plate is provided with and the first magnetic part magnetic The second magnetic part that property is repelled each other.

By using technique scheme, during piston portion moves up, the first magnetic piece on piston portion is also Moving up, now the first magnetic part is by the repulsion effect with the second magnetic part, provides the covering on inlet chamber simultaneously Extruding force, by covering extruding to air-vent, serves the effect sealing air-vent, simultaneously also to the covering on this outlet chamber Repulsion is provided, covering is pushed away air-vent so that it is aerofluxus, strengthen, in piston portion course of action, vacuum pump being served close Envelope effect, prevents it from use leaking gas.

In sum, this utility model has the advantages that

1, air inlet and gas outlet are asynchronous conduction and closedown, and during piston moves up, air inlet is closed And gas outlet conducting, it is achieved that the one-way flow of the gas in pump case, by the effect of secondary seal, strengthen sealing effectiveness；

2, by being provided with the insertion groove that the end for the second sliding bar is inserted in position, gas outlet, insertion groove reaches and second The cooperation of sliding bar, strengthens the effect of sealing；

3, offering the opening that the end for the first sliding bar is inserted on hush pipe, the first sliding bar is movable into and out out During mouth, serve the effect closing and opening hush pipe, control hush pipe and play the effect of noise reduction.

Accompanying drawing explanation

Fig. 1 is the structural representation of embodiment 1；

Fig. 2 is the generalized section of embodiment 1；

Fig. 3 is the enlarged diagram of A portion shown in Fig. 2；

Fig. 4 is the enlarged diagram of B portion shown in Fig. 2；

Fig. 5 is the structural representation that embodiment 1 omits dividing plate and vertical plate；

Fig. 6 is the generalized section of embodiment 2；

C portion enlarged diagram shown in Fig. 7 Fig. 6.

In figure, 0, pump case；01, pressure chamber；02, air inlet；03, gas outlet；031, insertion groove；04, dividing plate；041, air inlet Chamber；042, outlet chamber；043, vertical plate；1, check valve；11, air-vent；12, plate is covered；13, the first magnetic part；14, the second magnetic Property part；2, piston portion；3, the first sliding bar；31, through hole；32, block is abutted；4, the second sliding bar；5, elastic reset part；6, sliding Passage；7, hush pipe；71, baffle；72, venthole；73, interlayer；74, noise reduction sponge；75, opening；76, stepped hole；77, platform Rank；78, silencing cavity.

Detailed description of the invention

Below in conjunction with accompanying drawing 1 to accompanying drawing 7, this utility model is described in further detail.

This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model The present embodiment can be made after reading this specification by field technique personnel as required does not has the amendment of creative contribution, but As long as all being protected by Patent Law in right of the present utility model.

Embodiment 1: as shown in Figures 1 to 5, a kind of vehicle electric motor vacuum pump, including pump case 0, horizontally set in pump case 0 Having dividing plate 04, pump case 0 inner chamber is divided into gas conveyor chamber and pressure chamber 01 by dividing plate 04, is positioned at carrying for gas above dividing plate 04 Chamber, be positioned at below dividing plate 04 for pressure chamber 01, be provided with piston in pressure chamber 01, piston is joined by eccentric and piston rod Close and drive, i.e. the convert rotational motion of motor is the linear motion of piston rod by eccentric, makes piston that upper and lower motion to occur；

As in figure 2 it is shown, be provided with vertical plate 043 in gas conveyor chamber, gas conveyor chamber is divided into inlet chamber by vertical plate 043 041 with outlet chamber 042, inlet chamber 041 is connected with gas conveyor chamber respectively with outlet chamber 042, and the position of connection is provided with list Separated to being supported laterally by vertical plates 043 between valve 1, inlet chamber 041 and outlet chamber 042, pump case 0 is provided with and connects with inlet chamber 041 Hush pipe 7, inlet chamber 041 is by hush pipe 7 air inlet；The gas outlet 03 connected with outlet chamber 042 it is provided with on pump case 0.

It is not provided with vertical plate 043 and the state of dividing plate 04, only by by single as it is shown in figure 5, the structure of Fig. 5 is vacuum pump It is arranged on the position connected with air inlet 02 and gas outlet 03 to valve 1, plays the effect making vacuum pump inner air one-way flow.

As in figure 2 it is shown, the inwall of the side of piston and pressure chamber 01 is slip, close to the state abutted.Living When stopper rod is failure to actuate, piston is positioned at the middle part of pressure chamber 01, and when piston rod action, piston moves up and down, pressure chamber 01 interior Wall is provided with the first sliding bar 3 that the short transverse at pump case 0 moves, the first sliding bar 3 on the direction of piston upwards Main body be arranged in the shell wall of pump case 0, the lower end of the first sliding bar 3, can be with the lower surface of piston when piston moves downward Abutting, the upper end of the first sliding bar 3 arranges and can be fed through hush pipe 7 or block the air inlet 02 of hush pipe 7, when first When sliding bar 3 moves up, block hush pipe 7, make hush pipe 7 seal, when the first sliding bar 3 moves down, make hush pipe 7 It is connected with inlet chamber 041, makes inlet chamber 041 air inlet.

As in figure 2 it is shown, the inwall at pressure chamber 01 is provided with the height at pump case 0 on the direction moved downward of piston The second sliding bar 4 that direction is moved, the second sliding bar 4 is provided with the through hole 31 being connected with gas outlet 03, the second sliding The main body of bar 4 is arranged in the shell wall of pump case 0, and the lower end of the second sliding bar 4, can be with the upper table of piston when piston upwards Face abuts, thus when piston moves up, makes the second sliding bar 4 synchronize to move up, make through hole 31 and gas outlet 03 Be connected, reached the effect of aerofluxus, the upper end of the second sliding bar 4 during moving up and down, make gas outlet 03 open and Close, serve and seal and the effect of pressurize.

As shown in Figure 4, the side walls collapse of gas outlet 03 is formed for the insertion groove 031 that the upper end of the second sliding bar 4 is inserted, Being provided with the sealing member abutted with the second sliding bar 4 in insertion groove 031, sealing member is the elastic ring that rubber is made.

As in figure 2 it is shown, the shape of cross section of the first sliding bar 3 and the second sliding bar 4 is rectangular, both planforms in L-shaped, is provided with the elastic reset part 5 making the first sliding bar 3 and the second sliding bar 4 reset in sliding passage 6 simultaneously, elastic multiple Position part 5 is spring, and one end of spring abuts with sliding passage 6, and the other end of spring abuts with first, second sliding bar 4 respectively, It is provided with the abutting block 32 stretching out pressure chamber 01 inwall simultaneously in the end of the first sliding bar 3 and the second sliding bar 4, abuts block 32 Can abut with two end faces up and down of piston.

As in figure 2 it is shown, pump case 0 is respectively arranged with for the first sliding bar in the position near outlet chamber 042 and outlet chamber 042 3 and second sliding bar 4 sliding connect sliding passage 6, the sidewall of the first sliding bar 3 and the second sliding bar 4 respectively with sliding lead to The inwall in road 6 abuts.

As shown in Figures 2 and 3, air inlet 02 is provided with the stepped hole 76 inserted for hush pipe 7, hush pipe 7 also sets It is equipped with the step 77 matched with stepped hole 76, the inwall of stepped hole 76 is provided with screw thread, hush pipe 7 and stepped hole 76 screw thread Connecting, be provided with and the first sealing ring of hush pipe 7 laminating simultaneously on stepped hole 76, it is airtight that the first sealing ring serves raising Property effect, prevent gas from stepped hole 76 position reveal；

As it is shown on figure 3, the periphery of hush pipe 7 along hush pipe 7 be radially arranged with the first sliding bar 3 upper end transversal The opening 75 matched in face, opening 75 is to insert for the first sliding bar 3, serves the effect opening and closing hush pipe 7, with Time opening 75 be also through being radially arranged of hush pipe 7；

As it is shown on figure 3, position corresponding with opening 75 in stepped hole 76 arranges sealing member, sealing member can be second close Seal, the second sealing ring is arranged concentrically with stepped hole 76, and the second sealing ring serves the work of sealing to the upper end of the second sliding bar 4 With, prevent gas from revealing in the second sliding bar 4 position；The corner angle position of the second sealing ring is provided with chamfering simultaneously, keeps away Exempt from during phase shift, to make the corner angle position of the second sealing ring be snapped in sliding passage 6, it is to avoid second is close on sliding bar Seal is involved in sliding passage 6, affects the smooth movement of the second sliding bar 4.

As it is shown on figure 3, hush pipe 7 is inserted with several baffles 71 vertically, baffle 71 is separated in hush pipe 7 Multiple silencing cavity 78, baffle 71 is provided with venthole 72, and the sidewall of venthole 72 protrudes from the surface of baffle 71, simultaneously Extend to one end that hush pipe 7 is given vent to anger；Adjacent described silencing cavity 78 is interconnected by venthole 72, at hush pipe 7 It is provided with interlayer 73 between inwall and outer wall, in interlayer 73, is provided with noise reduction sponge 74.

The operation principle of embodiment 1 is: as in figure 2 it is shown, when vacuum pump action, piston moves down, and atmospheric pressure cavity is in negative Pressure, makes the check valve 1 in inlet chamber 041 open, and the first sliding bar 3 moves down simultaneously, and air inlet 02 is opened, and then air leads to Crossing hush pipe 7 air inlet, air-flow passes through each piece of baffle 71, and noise reverberates at sound insulation intracavity, reduces noise, disappearing in interlayer 73 Sound sponge 74 makes the intensity of sound of the noise through noise reduction sponge 74 reduce, and makes hush pipe 7 reach the effect of noise reduction, then lives Plug moves up, and air pressure in atmospheric pressure cavity rises, and makes the check valve 1 in outlet chamber 042 open, simultaneously the second sliding bar 4 by The piston of upper movement triggers, and the second sliding bar 4 moves up, and makes through hole 31 connect with gas outlet 03, has reached the effect of aerofluxus, Simultaneously after piston leaves, the first sliding bar 3 and the second sliding bar 4 are by elastic reset part 5 return, in the process, the pump housing Inside is opposing seal, will not reveal on check valve 1 due to air, and causes the problem that work efficiency reduces.

Embodiment 2: as shown in Figure 6 to 7, embodiment 2 is with the difference of embodiment 1, and in embodiment 2, check valve 1 wraps Including the air-vent 11 being arranged on dividing plate 04, the quantity of air-vent 11 is two, and is separately positioned on inlet chamber 041 and outlet chamber In 042, being then provided with the covering plate 12 covering air-vent 11 on air-vent 11, covering plate 12 is arranged on air-vent 11 and gives vent to anger Direction on, in example 2, dividing plate 04, piston and covering plate 12 use nonferromugnetic material to make, above piston with thoroughly The position of pore 11 correspondence is provided with the first magnetic part 13, is then provided with and first in the one side that covering plate 12 is relative with piston The second magnetic part 14 that magnetic part 13 magnetic is repelled each other.

The operation principle of embodiment 2 is same as in Example 1, but moves to dividing plate 04 at piston, in being i.e. atmospheric pressure cavity When air pressure rises, the covering plate 12 on the air-vent 11 of inlet chamber 041 is pressed together on air-vent 11 by the first magnetic part 13, it is to avoid Air-flow enters in pressure chamber 01；Simultaneously by the effect of repulsion, it is lifted up covering the covering at outlet chamber 042, makes gas Body circulates, and the most in the process, by the effect of magnetic force, gas will not be revealed from the position of air-vent 11, and sealing effectiveness is relatively Good.

Claims (10)

1. a vehicle electric motor vacuum pump, including pump case (0), is provided with pressure chamber (01), described pressure in described pump case (0) Chamber (01) is respectively communicated with the air inlet (02) that is arranged on pump case (0) and gas outlet (03), described air inlet (02) and giving vent to anger It is provided with check valve (1) on mouth (03), in described pressure chamber (01), is provided with the piston making pressure chamber (01) produce air pressure change Portion (2), it is characterised in that: described pump case (0) interior sliding connects to be had the first slipping part being positioned at air inlet (02) and is positioned at The second slipping part in QI KOU (03), described first slipping part and the second slipping part be positioned on the activity direction of piston portion (2) and Can be promoted by piston portion (2), described first slipping part and the second slipping part make air inlet (02) and gas outlet (03) asynchronous respectively It is turned on and off.

Vehicle electric motor vacuum pump the most according to claim 1, it is characterised in that: described pump case is respectively arranged with in (0) The elastic reset part (5) making the first slipping part and the second slipping part reset, described first slipping part or the second slipping part are arranged There is the through hole (31) making pressure chamber (01) with ft connection.

Vehicle electric motor vacuum pump the most according to claim 2, it is characterised in that: described first slipping part is positioned at piston The lower section of the short transverse in portion (2), described second slipping part is positioned at the top of the short transverse of piston portion (2), described through hole (31) it is arranged on the second slipping part.

Vehicle electric motor vacuum pump the most according to claim 3, it is characterised in that: described first slipping part includes that first is sliding Moving bar (3), described second slipping part includes the second sliding bar (4), and described pump case (0) is internally provided with for the first sliding bar (3) The sliding passage (6) slided with the second sliding bar (4), described first sliding bar (3) and the second sliding bar (4) are to sliding passage (6) the abutting block (32) abutted with piston portion (2) is extended outside.

Vehicle electric motor vacuum pump the most according to claim 4, it is characterised in that: the sidewall of described gas outlet (03) is arranged There is the insertion groove (031) that the end for the second sliding bar (4) is inserted.

Vehicle electric motor vacuum pump the most according to claim 3, it is characterised in that: described pump case is provided with dividing plate in (0) (04), described pressure chamber (01) is positioned at the lower section of dividing plate (04), described dividing plate (04) be arranged above gas conveyor chamber, described gas Conveyor chamber include in inlet chamber (041) and outlet chamber (042), described inlet chamber (041) and outlet chamber (042) respectively with pressure chamber (01) connection, described check valve (1) is separately positioned on inlet chamber (041) and outlet chamber (042), described air inlet (02) with enter Air cavity (041) connects, and described gas outlet (03) connects with outlet chamber (042).

Vehicle electric motor vacuum pump the most according to claim 6, it is characterised in that: it is provided with in described air inlet (02) and disappears Sound tube (7), described inlet chamber (041) passes through hush pipe (7) and ft connection, is provided with for first sliding in described hush pipe (7) Move the opening (75) that the end of bar (3) is inserted.

Vehicle electric motor vacuum pump the most according to claim 7, it is characterised in that: described air inlet (02) is axially disposed There is the stepped hole (76) inserted for hush pipe (7), described hush pipe (7) is provided with the step coordinated with stepped hole (76) (77)。

Vehicle electric motor vacuum pump the most according to claim 8, it is characterised in that: described hush pipe is inserted in (7) vertically Being provided with several baffles (71), described baffle (71) will be separated into multiple silencing cavity (78) in hush pipe (7), each described Being provided with venthole (72) on baffle (71), the sidewall of described venthole (72) protrudes from the surface of baffle (71), described It is provided with interlayer (73) between inwall and the outer wall of hush pipe (7), in interlayer (73), is provided with noise reduction sponge (74).

Vehicle electric motor vacuum pump the most according to claim 6, it is characterised in that: described check valve (1) includes being arranged on Air-vent (11) on dividing plate (04), described air-vent (11) is separately positioned in inlet chamber (041) and outlet chamber (042), institute State and on dividing plate (04), be provided with the covering plate (12) covering air-vent (11), described dividing plate (04), piston portion (2) and covering plate (12) use nonferromugnetic material to make, described piston portion (2) is provided with the first magnetic part (13), on described covering plate (12) It is provided with the second magnetic part (14) repelled each other with the first magnetic part (13) magnetic.